Murata Manufacturing Co., Ltd.

Murata Manufacturingco., Ltd.

Takashi Kokubun

Takaaki Matsui

Taichi Kogure

Kazuki Honda

Naoko Yamakawa

Masumi Fukuda

A battery includes a positive electrode having a first strip shape and a positive electrode lead, and a negative electrode having a second strip shape and a negative electrode lead. First ends of the positive electrode and the negative electrode in a longitudinal direction are on an inner peripheral side, and second ends of the positive electrode and the negative electrode in the longitudinal direction are on an outer peripheral side. The positive electrode lead and the negative electrode lead are extended out from a first end side in a width direction of the positive electrode and the negative electrode, and a first thickness of the positive electrode on the first end side is thinner than a second thickness of the positive electrode on a second end side in the width direction.

Battery, battery pack, electronic device, electric vehicle, power storage device, and power system

A secondary battery includes a cathode terminal; an anode terminal; a wound electrode body; and a step reducing member. The step reducing member is attached to one or both of a first cathode wound portion and a first anode wound portion in one or more of a first region, a second region and a third region. The first region is in a major axis direction outside the cathode terminal in a wound direction of a cathode, and the second region is in the major axis direction outside the anode terminal in the wound direction of an anode and the third region between the cathode terminal and the anode terminal.

Secondary battery, battery pack, electric vehicle, electric power storage system, electric tool, and electronic apparatus

Growing community of inventors

Kyoto, Japan

Takashi Kokubun